Megahertz quantifies what aspect of a cable system?

Megahertz (MHz) quantifies bandwidth, which refers to the capacity of the cable system to transmit data over a given time period. In networking and telecommunications, bandwidth is crucial because it determines how much data can be sent and received within a specific time frame. Higher megahertz values indicate a greater bandwidth, allowing for faster and more efficient data transmission.

The other options—voltage level, signal strength, and power rating—do not directly relate to the concept of megahertz. Voltage level refers to the electrical potential difference, signal strength measures the quality of the signal being transmitted, and power rating relates to the maximum amount of electrical power that a cable can safely carry. None of these concepts utilize megahertz as a measurement unit, making bandwidth the correct answer in this context.